EPTFE Filter Disc Stickers for Mushroom Jar Lids | 59mm & 76mm

EPTFE Synthetic Filter Disc Stickers for Mushroom Cultivation

Take your mushroom growing setup to the next level with these high-performance EPTFE synthetic filter paper stickers. Designed specifically for wide-mouth jar lids, these self-adhesive filter discs allow essential fresh air exchange while keeping out contaminants — giving your mycelium the ideal breathable environment to thrive.

Made in Mainland China.

Why Growers Love These Filter Discs

• Waterproof & Breathable: Dense, uniform 0.22 μm micropores block dust, moisture, and airborne contaminants while maintaining steady gas exchange.
• High-Quality EPTFE Material: Non-toxic, high-temperature resistant, and durable — safe for sterilization processes common in mushroom cultivation.
• Easy Self-Adhesive Application: Simply peel and stick onto jar lids, grow bags, or other grow containers — no tools required.
• UV & Chemical Resistant: Strong chemical inertia and UV resistance ensure long-lasting performance even under demanding conditions.
• Pressure Balancing: Helps equalize internal/external pressure around sealed containers, protecting jar integrity during sterilization and colonization.
• Quick Air Recovery: Air permeability is rapidly restored after contact with water, oils, or other liquids.
• Thin & Lightweight: Low-profile design keeps jars clean-looking without adding bulk.
• Generous Quantity: Each sheet includes either 12 pcs (76.2mm) or 16 pcs (59mm) — plenty for multiple jars in one go.

Specifications

Perfect For

• Mushroom spawn jar lids (oyster, shiitake, lion's mane, and more)
• Home and small-scale mushroom cultivation setups
• Wide-mouth mason jars and other sealed grow containers
• Family plant growing and terrarium venting

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For more information on food-safe materials and filtration standards, visit the FDA – Food Ingredients & Packaging resource.

Frequently Asked Questions

Q: What size filter disc sticker should I choose for my mason jars?

A: Choose the 59mm (S) size if you have standard regular-mouth or smaller wide-mouth jars, and the 76.2mm (L) size for larger wide-mouth mason jars. When in doubt, measure your jar lid opening before ordering.

Q: Are these EPTFE filter stickers safe to use during pressure sterilization?

A: Yes! These filter discs are made from high-quality EPTFE, which is non-toxic and high-temperature resistant, making them well-suited for the sterilization processes used in mushroom cultivation workflows.

Q: How do the filter discs prevent contamination while still allowing airflow?

A: The 0.22 μm micropore structure creates a barrier fine enough to block dust, mold spores, and airborne contaminants, yet the EPTFE membrane remains breathable to allow essential fresh-air exchange — critical for healthy mycelium development during colonization.

Q: How many filter stickers do I get per sheet?

A: Each sheet contains either 16 pcs of the 59mm (S) size or 12 pcs of the 76.2mm (L) size — providing plenty for multiple jars from a single purchase.